Hack saw



A. G; VOLTZ HACK SAW Original Filed March 20, 1922 ATTORNEYS.

Patented June 2, 1925.

' isiazn warren stares- PATENT OFFICE.

ALBERT G. VOLTE, OF TULSA, OKLAHOMA.

HACK SAW.

(iriginal application filed March 20, 1922, Serial 1W0. 15,153.

Divided and this application filed March 19, 1923. Serial No. 625,964.

20, 1922, Serial No. 5 5,153, the objects being to produce a saw capable of cutting obstrnctions in places and at points inaccessible to ordinary hack saws and adjustableto accommodate saw blades of different length and different angular positions. 1 li ith these objects in view, the invention consists in certain novel and useful features of construction and combinations 0t parts as hereinafter described and claimed; and in order that it maybe fully understood, reference is to be had to the accompanying draw-- ing, in which Figure 1 is a side elevation of a hack saw embodying the invention;

Figure 2 is a plan View of the blade set to cut in a plane to one side of the plane of the back or frame;

Figure 8 is an enlarged section on the line IIIIII of Figure l; and

Figure 4c is a fragmentaryside view of a modified type, with the back broken away to disclose more clearly its extensibleconstruction.

Referring to the drawing, 1 indicates the handle of the :lrainc ol the hacl; saw, and secured as at 2 or otherwise, at one end to the handle, is the back 3, of channeled IOlli'l. In Figure 4, the back, for a suitable distance from its "frontend, is expanded to greater width and depth as at a, for the-accommodation of an extension 4 of the. back, as hereinafter more particularly refered to.

In the lower edges of the channeled back, there are provided equi-spaced notches 5, and at the extreme front end, which preterably tapered, the sides are extended downward to constitute ears 6, for the reception between them of the front end of a saw blade 7, one of the ears having a pin 8 projecting transversely toward but spaced from the other ear, so that the blade may be interposed between the pin and spaced ear preliminary to the attachment of the saw to or its detachment from said pin.

The blade has an eye 9 to receive the pin,

and the free end of the latter is headed to prevent accidental disengagement of the blade. In the construction shown by Figure 4, the ears 6 and pin 8 are on the extension 4? of the back-,this extension fitting slidingly in the back, and, under proper adjnstinent, accommodating blades of GIF-ICGP'tlOllill length. In the said modified torin exemplified by Figure l, the l ront'end. of the handle equipped section of the back, is formed with depending lugs 10 connected by a cross-pin 11, for engagement with notches l in the lower edges o't the extension to cure the latter at the point of adyustr cnt dc sired to accommodate a F or the attachment of the rear end otthe blade, the followlng construction is provided: An arm 12 pro1ects from the back in the plane of the channel thereof, and in the preferred construction hasan arm 13 litting snugly in the channel and seen red to the back by a'U-shaped clip 14 fit g thereon with its ends connected by acrosspin 15 engaging a recess 16 formed in the angle or junction point of the two arms. To secure the clip and arms 12 and 13 at the desired point oi adj ustinent on the channeled back, the arm 13 is equi-pped with a pin 17 engaging opposite notches 5, as shown by dotted lines in Figure 1, and to adjust the clip and arms, the saw blade is freed at its rear end and the arm 12 is then swung toward the handle on pin 15 as the axis. This withdraws pin 17 from the notcl-ies so that the clip with thesaid arms can he slid 'lorwaml or rearward on the back. Reversed swinging movement will dispose the pin 1'? in en gageinent with the desired notch 5.

An angle bracket 18 is secured by a set screw 19 at the desired point on the arm 12, the latter having a longitudinal series oi cavities 20 for respective engagement by the set screw to guard against slippage of the angle bracket, which may be arranged to project forward or rearward accordingly as it is desired to employ short or long saw blades. The angle bracket'may also be arranged up'right as in full lines '1" invo 716d .1: in dotted lines, it being apparent that when projecting rearward, it can be inverted only 7 when at or near the lower extremity of the arm 12', so that the saw can extend past the arm, tllflli'IS, if the saw, at its rear end, stands in the "same plane as said arm and the particularlength ot blade. 1

ti f) ilU channel. If the rear end of the saw is deflected laterally beyond the plane mentioned, as hereinafter referred to more particularly, the angle plate, in inverted position, may be set at any intermediate point in the length of the arm 12.

The opposite end of the angle plate from its point of attachment to the arm 12, constitutes a longitudinal bearing 21 for an angular holder 22 for the rear end of the blade. The rear end of the holder is threaded at 23 for engagement by a nut 24 to tension the blade.

The other end of the holder projects at an angle to the shank and terminates in a head 25, ofi'set laterally, and having a face parallel with the shank and a side face approximately radial of the axis of the shank.- A headed pin 26 projects from the radial face for engagement with the rear end of the blade when said face occupies avertical plane as in Figure 1, so that the blade shall out in the plane of the longitudinal center of the back. A similar pin 27 projects from the parallel face for engagement with the rear end of the blade when the holder is set with its angle arm projecting laterally with respect to the back, as shown by Figure 2, this adjustment holding the rear end of the blade sprung to the position in which it 'appears in said last-named figure, so that the blade may be caused to cut a pin or the like substantially flush with the surface from which such pin or the like projects.

The angular holder is susceptible of securement against accidental turning movement, but the means for cooperation with the nut 24; or the like, in accomplishing this purpose, is not detailed as it forms a part of and is claimed in theparent application hereinbefore identified.

IVith the construction described, it is possible when set as shown in full lines, to cut a pin or bolt within a tube of internal diameter but little greater than the distance between the top of the back and the toothed edge of the blade, provided the part to be cut is located from the entrance end of the tube a distance which can be operatively spanned by the blade. It is also possible to cut plates to an extent equal to that from the top of the back to the lowest point of the saw, when inclined, as in dotted lines, Figure 1, and this out can be made from an interior point of the plate, provided ,an opening is first cut in the plate large enough to receive the tapered end of the back and the front extremity of the blade when the latter is inclined. Various other cutting actions, impracticable with the ordinary hack saw will be apparent to those skilled in the use of such appliances. 7

From the above description it will be obvious that I have produced a hack saw embodying the features of advantage enumerated in the statement of the objects of the a handle at one end. and a transverse pin at the other end, an arm depending from the back intermediate the handle and said pin,

an angle bracket mounted on said depending arm and adjustable toward and from the back, a saw blade pivoted at its frontend on said pin, and a holder pivoted to the rear end of the saw blades and longitudinally adjustable relative to the back, on the angle bracket, to tension the blade and to accommodate adjustments of said angle bracket toward and from the back.

2. A hack saw comprising a back having a handle at one end and a transverse pin at the other end, an arm depending from the back intermediate the handle and said pin, an angle bracket mounted on the depending arm and adjustable toward and from the back, an angle holder rotatably and longitudinally adjustable on the angle bracket, and a saw blade pivotally connected at its ends to said pin and angle holder respectively.

3. A hack saw comprising a back having a handle at one end and a. transverse pin below and in proximity to the other end, an arm depending from the back intermediate the handle and said pin, an angle bracket reversibly mounted. on said depending arm and adjustable toward and from the back, a saw blade pivoted at its front end on said pin, an angle holder attached to the rear end of the saw blade and rotatable and longitudinally movable in the said angle bracket, means to lock the holder against turning movement, and means to impart longitudinal movement to it to tension the saw blade. i

' 4:. A hack saw comprising a channeled back having a handle and a transverse pin, an arm depending from the back intermediate the handle and said pin, an arm projecting from the first-named arm and fitting slidingly in the channelof the back, means for securing said arms at different points in the length of the back, an angle bracket detachably mounted on the first-named arm, an angle holder adjustably carried by the angle bracket and provided with pins standing at right angles to each other and either adapted to parallel the first-named pin under proper adjustment of the angle holder, and a saw blade detachably connected at its ends to the first-named pin and one of the pins of the angle holder.

In witness whereof I hereunto affix my signature.

ALBERT e. VOLTZ. 

